Door lock



FIG. 1 is a top, front and right side perspective view of a door lock showing my new design;

FIG. 2 is a front elevational view thereof;

FIG.3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof, the bottom being a mirror image of that shown;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a left side elevational view thereof. 

The ornamental design for a door lock, as shown and described. 